ioquake3 (or ioq3 for short) builds upon id Software's Quake 3 source code release. It cleans it up, fixes bugs, and adds features. Its goal is to be the Quake 3 distribution upon which people base their games and projects. Its design goals include optimizing the engine for playing Quake 3: Arena, Team Arena, and all popular mods. This distribution of the engine has been ported to many new platforms. While it doesn't have PunkBuster (and never will), it does provide more security for servers and clients by way of various bugfixes which aren't in id's client.
LettersFall 2 is a word game that combines Tetris and Scrabble. It is a fun yet educational game for both children and adults. It downloads and installs in seconds. It features full color, high resolution visual graphics, digital sound effects, a digitally orchestrated music soundtrack, easy-to-play mouse controls, an American English dictionary with over 20,000 words, a saved high scores table, and saved game preferences.
Construder is a 3D game featuring a dynamic infinite world of cubes to explore and change. In an artificial infinite structure, the player has to gather resources for construction purposes and for basic survival. Its 3D engine and basic game play are inspired by Minecraft and Infiniminer. The goal is to get 10,000,000 score points and get the "Construder" rank. Dangers the player might run into are starvation, as all actions require biological energy, and the randomly appearing robot drones that teleport the player far away. The game is feature complete and ready to play.
Cretan Hubris is an infinite maze escape game set in ancient Greece. As the master architect Daedalus, having just completed the Labyrinth, you must now escape your creation while staying ahead of a deadly energy wave sent by petty and jealous gods. Features include customizable controls, joystick support, and sound effects.
Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century. The game is open-ended, and you are free to explore the millions of star systems in the game. You can land on planets, slingshot past gas giants, and burn yourself to a crisp flying between binary star systems. Pioneer has a sneaking resemblance to Frontier: Elite 2.
Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
Avoision is a very simple arcade-style game. There's no story, no fancy graphics, no campaigns--just frantic, high-speed gameplay. Gameplay consists of moving a green block around with the arrow keys. The goal is to capture the red block before the timer runs out to score points. You must avoid all the white blocks that appear as you progress through the game.